Jagged Array Manipulator

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Jagged_Array_Manipulator
{
    class Program
    {
        static void Main(string[] args)
        {
            int rows = int.Parse(Console.ReadLine());
            if (rows==0)
            {
                return;
            }
            var matrix = new double[5][];
            for (int row = 0; row < rows; row++)
            {
                var currentRow = Console.ReadLine()
                    .Split(new[] { " " }, StringSplitOptions.RemoveEmptyEntries)
                    .Select(double.Parse)
                    .ToArray();
                    matrix[row] = new double[currentRow.Length];
                for (int col = 0; col < currentRow.Length; col++)
                {
                    matrix[row][col] = currentRow[col];
                }
            }
            for (int row = 0; row < rows-1; row++)
            {
                if (matrix[row].Length==matrix[row+1].Length)
                {
                    for (int rowCurrent = row; rowCurrent <=row+1 ; rowCurrent++)
                    {
                        for (int col = 0; col < matrix[rowCurrent].Length; col++)
                        {
                            matrix[rowCurrent][col] = matrix[rowCurrent][col]*2;
                        }
                    }
                }
                else
                {
                    for (int rowCurrent  = row; rowCurrent <=row + 1; rowCurrent++)
                    {
                        for (int col = 0; col < matrix[rowCurrent].Length; col++)
                        {
                            matrix[rowCurrent][col] = matrix[rowCurrent][col] *0.5 ;
                        }
                    }
                }
            }
            while (true)
            {
                string command = Console.ReadLine();
                if (command.ToLower()=="end")
                {
                    break;
                }
                string[] commandParts = command
                    .Split(new[] { " " }, StringSplitOptions.RemoveEmptyEntries);

                if (commandParts.Length !=4 )
                {
                    continue;
                }

                string commandArgs = commandParts[0];
                int row = int.Parse(commandParts[1]);
                int col = int.Parse(commandParts[2]);
                double value = double.Parse(commandParts[3]);

                if (commandArgs.ToLower()=="add")
                {
                    if (row<0 || row>rows || col<0  ||  col>matrix[row].Length )
                    {
                        continue;
                    }
                    matrix[row][col] += value;
                }
                else if(commandArgs.ToLower()=="subtract")
                {
                    if (row < 0 || row > rows || col < 0 || col > matrix[row].Length)
                    {
                        continue;
                    }
                    matrix[row][col] -= value;
                }

            }
           for (int row = 0; row < rows; row++)
           {
               for (int col = 0; col < matrix[row].Length; col++)
               {
                   Console.Write(matrix[row][col]+" ");
               }
               Console.WriteLine( );
           }

        }
    }
}